OWC ThunderBlade V4 Review (4TB) – Worlds Fastest External Storage


For our Real World File Transfer Comparison, we have included the Mercury Helios 3 PCIe TB3 Chassis, TekQ Rapide TB3 Portable SSD, Glyph USB 3.1 2TB Atom RAID external SSD, ADATA SE730, Samsung T3, Intel Optane 900P in our testing with the OWC ThunderBlade.  Our test structure is actually quite simple and consists of physically copying data files from one location on a disk to another.

To be sure of what we were seeing, we repeated these tests several times, many including a system reboot.  The ThunderBlade V4 was just that fast! After this, we went ahead and retested the Optane on the Z370 Test System just to confirm what we were seeing.  This test truly is the bread and butter of the OWC ThunderBlade and was totally unexpected.  Wow.


We wanted to include one last test result as this may alleviate some of the difficulties experienced by those trying to set up, or buy a system that has Thunderbolt 3.  In our case, we already had a system that contained Thunderbolt 3, this being our HP Spectre laptop with a 7th Gen Intel CPU and literature all over the internet stating that Thunderbolt would be PCIe 3.0 x4…vice X2.  This was our test result:


Now, as much as we are just a bit more comfortable with the low 4K read result, this is nowhere near what we need to see from the ThunderBlade V4. Granted, this is still the best performance (up until today) that we have seen from an external storage medium. It resulted in our purchase of the ASRock Thunderbolt 3 AIC and desktop testing.


The OWC ThunderBlade V4 was created for the media professional working in very large files, and needing to manipulate save and transfer them quickly.  Efficiency is the key here.  The OWC ThunderBlade is the fastest external storage device we have ever tested, and the fastest available to the best of our knowledge.  When we can observe speeds up to 2.9GB/s in any data transfer to an external medium, that says all that needs to be said.


The OWC ThunderBlade V4 is available to purchase directly from OWC  and it is expensive.  It is a niche item that is priced out of the range of most consumers and small businesses, quite frankly reserved for those that need to transfer and store data this fast…media professionals. As fast as it is, we did realize concerning performance restrictions in data transfer of low 4K reads initially, however, this was not evident whatsoever in our real life testing, transferring video files faster than we have seen before.  Similarly, the low 4k read performance above is up to par.



Last but not least, the ThunderBlade v4 comes with a 3-year limited warranty, 24/7 support and the OWC reputation, this company quite frankly being one of the best in the business for taking care of its customers.  As much as we would like to see pricing a bit lower, everything we have seen here speaks to Editor’s Choice.  Great product OWC!

Check out the ThunderBlade V4 at OWC Today!


OWC Thunderblade V4 Rating

Product Build and Packaging
Ease of Installation
Three Year Warranty
Product Pricing

External Speed!

The OWC Thunderblade V4 is the fastest portable storage medium available today. With performance of up to 2.9GB/s through a single Thunderbolt 3 cable, this product is a huge step up in the storage world.

User Rating: 4.55 ( 1 votes)

One comment

  1. blank

    Come on, 3 years?? That should be ONE star!!!! That is a joke! Should be at least 5 year warranty, or better 10 years for that price. For the 3 year warranty, forget it, I will build my own and will be 10 year warranty for the ssd. And it will not bog down with a lot of writes like this one.

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